/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the License at the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apereo.portal.portlets.dynamicskin;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.portlet.PortletContext;
import javax.portlet.PortletPreferences;
import javax.portlet.PortletRequest;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;

/**
 * Default {@link DynamicSkinInstanceData} implementation that pulls required data from the provided
 * {@link PortletRequest}.
 */
public class DefaultDynamicSkinInstanceDataImpl implements DynamicSkinInstanceData {

    private String portletAbsolutePathRoot;
    private String skinName;
    private PortletRequest portletRequest;
    private Map<String, String> variableNameToValueMap;

    public DefaultDynamicSkinInstanceDataImpl(final PortletRequest request) {
        this.pullDataFromPortletPreferences(request.getPreferences());
        this.pullDataFromPortletContext(request.getPortletSession().getPortletContext());
        this.portletRequest = request;
    }

    /** @see DynamicSkinInstanceData#getPortletAbsolutePathRoot() */
    @Override
    public String getPortletAbsolutePathRoot() {
        return this.portletAbsolutePathRoot;
    }

    /** @see DynamicSkinInstanceData#getSkinName() */
    @Override
    public String getSkinName() {
        return this.skinName;
    }

    @Override
    public PortletRequest getPortletRequest() {
        return this.portletRequest;
    }

    /** @see DynamicSkinInstanceData#getVariablesValuesMap() */
    @Override
    public Map<String, String> getVariableNameToValueMap() {
        return this.variableNameToValueMap;
    }

    @Override
    public int hashCode() {
        return HashCodeBuilder.reflectionHashCode(this);
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }

    private void pullDataFromPortletPreferences(final PortletPreferences prefs) {
        this.skinName =
                prefs.getValue(
                        DynamicRespondrSkinConstants.PREF_SKIN_NAME,
                        DynamicRespondrSkinConstants.DEFAULT_SKIN_NAME);

        this.variableNameToValueMap = new HashMap<>();
        final Enumeration<String> prefNames = prefs.getNames();
        while (prefNames.hasMoreElements()) {
            final String prefName = prefNames.nextElement();
            if (prefName.startsWith(DynamicRespondrSkinConstants.CONFIGURABLE_PREFIX)) {
                final String nameWithoutPrefix =
                        prefName.substring(
                                DynamicRespondrSkinConstants.CONFIGURABLE_PREFIX.length());
                final String value = prefs.getValue(prefName, "");
                this.variableNameToValueMap.put(nameWithoutPrefix, value);
            }
        }
    }

    private void pullDataFromPortletContext(final PortletContext ctx) {
        this.portletAbsolutePathRoot = ctx.getRealPath("/");
    }
}
